Electrically driven and lighted sewing machine



F. H. KEENEY May 7, 1929.

ELECTRICALLY DRIVEN AND LIGHTED SEWING MACHINE Filed Jan. 21, 1927lz'fzz entor': T712717? Z396 72g Patented May 7, 1929.

UNITED STATES 1,711,192 PATENT OFFICE.

FRANK H. KEENEY, OF BELVIDERE, ILLINOIS, ASSIGNOR TO NATIONAL SEWINGMACHINE COMPANY, OF BEL-VIDERE, ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRICALLY DR IVEN AND LIGHTED SEWING MACHINE.

Application filed January 21, 1927.

This invention relates to electrically driven and lighted sewingmachines.

and to the lighting device located adjacent to the supply socket orconnection in the room. In such an arrangement, the junction block lieson the floor and is liable to become injured. IVhen the feed wire orwires are left connected to the machine, but detached at the other endfrom the source of supply, it is generally inconvenient for the operatorto arrange the wires and the junction block about the machine head, soas to permit of the dropping of the latter into the drop-head cabinet.

The principal object of the present invention is to produce aconstruction which will obviate these and other objections; which willpresent a neat and compact appearance and which will enable thenecessary connection and disconnection to be made by the operator withaccuracy and speed and without danger of injury to the junction block orother parts of the construction. I

To this end, the invention consists in the structural arrangement andcombinations of the several parts illustrated, described, and pointedout in the claims hereto appended.

In the drawings:

Figure 1 is a side elevation of a portion of the back of a sewingmachine frame to which the invention has been applied.

Figure 2 is a side. elevation of a portion of the back of the standardto which the junction'block is secured.

Figure 3 is an edge view of the junction block, its casing being insection.

Figure 4 is a detached view in perspective of the feed or supply cable.

Figure .5 is a view in perspective of a rheostat and foot operativeparts connected therewith.

the e ectrical circuit used.

The frame of the sewing machine illus;

Fi' re 6 is a diagrammatic view showing Serial No. 1G2,470.

trated comprises a base plate 1, a hollow standard 2, standing uprighton the base, and a horizontally disposed, forwardly directed hollow arm3, integrallyconnected with the standard. The usual operating mechanismsof a sewing machine are located within the standard and arm, and form nopart, per se, of the present invention. The machine is provided with adriving motor designated as a whole at M, and with an electricallighting device indicated, as a whole, at L,-the lighting device beinglocated, preferably, upon the front of the arm 3.

Upon its rear surface, the standard 2 is provided with a bearing block,comprising outwardly extending bosses 4., 5 and 6, upon the outervertical bearing surfaces of which a junction block B is secured bymeans of screws 7 or any other suitable means. The adjacent margins ofthese bosses are separated by a space indicated at 8, and the blocks 5and 6 are similarly spaced apart as indicated at 9, whereby convenientroom is obtained for wires leading from the block B to the motor M andto the lighting device L.. 'lhis arrangement provides for compactness instructure and for neatness of appearance.

F designates the feed line cable provided on one end with a convenienttype of screw plug 10 for attachment to any suitable source of electriccurrent. At the other end the cable has a plug 11 adapted for attachmentto the socket 12 in the block B. To make electric contact with the twocontact posts 13 and 14, in the said socket, the bored plug 11 -isentered through the opening 15 in the block case 16. The block casing 16has an opening 17 through which a plug 18 may be entered and be put intoelectrical connection with the junction block B by means of thetermistood without further illustration or description.

Referring to the circuit diagram, Figure 6, it will be seen that thecontact points 13 Cir and 14 are directly connected by wires 2-1 and 25,respectively, to the lighting device L, so that the instant the cable Fjoins the source of electric supply with the block B, through theconnection of the plug 11 with the contact points 13 and 14, the lightcircuit will be complete. It will be necessary for the operator only tomanipulate the chain switch S to turn the light oil or on as desired,and this without regard to whether or not the motor may be running. Itwill be understood also that the wires 24 and 25 are usually encased ina cover 26 and are laid in the space 8 of the bearing block. The cable26 is then brought around the end 27 of the boss 6,

across the inside of the standard 2, and snugly against it, and thendirectly up to the lighting device. This makes a neat and very compactconstruction.

The contact post 13 on the conductor plate 28 has a binding post 29 towhich a motor wire 29 is attached. The light wire 24 is bound to thissame post 29. The other contact post 14. on the conductor plate 30 hastwo binding posts 31 and 32. The other light wire, 25, is attached tothe post 31. The other motor wire, 33,.is attached to the binding post34 on the conductor plate 35, the latter extending below the insulatingstud 36. One end of the conductor plate 30 also eX- tends below the stud36. The stud 36 is provided with two bores or sockets to receive contactpins 37 and 38 on plug 18, the ends of which pins are thereby adapted torest upon the plates 85 and 30, respectively, to make electrical contactat 19 and 20, respectively.

The contact pins 37 and 38 are connected by wires 39 and 40 in the cable21 with the control-switch plate 22 and the rheostat R, the pin 37contacting with plate 35 at 19, and pin 38 with plate 30 at 20. Thecircuit is normally open because contacts 19 and 20 are separated, andrheostat switch also open. But when the plugs 11 and 18 are inserted inthe block B, and contacts made at 19 and 20, all the operator has to doto start the motor M is to depress the treadle 23 which closes therheostat circuit and establishes an operative circuit through the motor-It will be understood that the circuit to the lighting device L will becontrolled by the switch operating chain S and the circuit to the motorby the switch operating treadle member 22, and that both may be'open orclosed at the same time, or one open when the otherxis closed. I

An advantage in having the junction block B permanently attached to themachine frame is that it obviates the necessity of having a junctionblock attached to the supply cable F, and in the event of damage to thecable F, the cost of repairs will be much less than would be the case itthe junction block were attached to the cable.

Another advantage is that when lowering the machine frame into thedrop-head cabinet, or covering the machine frame with a portable cover,the cable F as well as the foot treadle and cable 21 may be separatelydisposed of without the necessity of wrapping them about the machineframe, or of handling the junction block.

Another advantage resulting from my improved construction lies inthefact that the shortest motor and light wires are used on the machine.This lessens the possibility of injury to the wires by reason of comingin contact with the machine parts, as is'likely when the motor and lightwires are led downwardly through the hollow standard to a point belowthe bed plate.

I claim as my invention:

1. In a sewing machine having the conventional gooseneck frame,operating mechanism, an electric motor and an electric lighting device.connected with the gooseneck, a

junction block rigidly secured to the gooseneck and wired for electricalconnection with both the motor and the lighting device, a rheostat,removable means for connecting said rheostat with the junction block,and

removable means for supplyin electric current to said block, saidremovable means being dissimilar, whereby they are not interchangeable.

2. In a sewing machine having the conventional gooseneck frame,operating mechanism, an electric motor and an electric light ing device,connected with the gooseneck, a junction block rigidly secured to thegooseneck and wired for electrical connection with both the motor andthe lighting device, and two dissimilar pairs of contact members on saidjunction block adapted to cooperate with.

corresponding pairs of removable contact members, whereby they are notinterchangeable.

In testimony, that I claim the foregoing as my invention I affix mysignature this 14th day of January, 1927.

FRANK n. KEENEY,

